Data structure and Hierarchical structure

Data structure noun - Computer science) the organization of data (and its storage allocations in a computer.

Hierarchical structure and data structure are semantically related. In some cases you can replace phrase "Hierarchical structure" with "Data structure", this phrases are similar.

Hierarchical structure noun - A structure of data having several levels arranged in a treelike structure.

Data structure and hierarchical structure are semantically related. You can use "Data structure" instead a noun phrase "Hierarchical structure".